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Coleman evcon EB15A heat is stuck on. Thermostat disconnected to make sure it wasn't the issue. Stays on and heat blowing. What can I try?

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It sound like your first stage sequencer is stuck in the 'on' position Shad. Usually the first stage is responsible for turning on the blower on low speed while energizing the first 5 kw of electric heat.

The problem you describe is typical of 'stuck' contacts within the sequencer.

No field service to the sequencer, replacement is necessary. Of course without actually seeing your furnace, this is just a resonably educated guess.

Posted on Oct 01, 2015

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Posted on Jan 02, 2017

Therinnaiguy
  • 1420 Answers

SOURCE: Coleman furnace blower runs continuously

You should be seeing 120 volts to the igniter. Anything less requires either a replacement of the transformer, start relay or control module.

Posted on May 30, 2008

  • 6 Answers

SOURCE: coleman evcon Dgato7obdc

Small blower motor? Are you talking about the combustion blower if so then check your vents for blockage.. if the vents are blocked won't work... if it has a control board init it will give you a diagnostic code. Flashing light on the board... count the flashes and look up the fault on the chart in your owners manual ot on the furnace door..

Posted on Jan 15, 2009

  • 3 Answers

SOURCE: coleman evcon dgat090bdd. New ignitor won't heat up.

Looks like 4 flashes might be high limit fault on this furnace. (I don't have a manual for this furnace, just searched online for the code meaning) Is the unit running flame at all? Is the unit running flame for a while then shutting flame off before desired temp is reached? Does the main air fan turn on to circulate air through your diffusers? Does it feel like the unit has much air flow out of the diffusers if the fan is running? Is your air filter clean? If it is infact your high limit switch, it is usually caused by not having enough airflow through the furnace and overheating occurs.

Hope this helped, let me know if I can assist you further :)

Posted on Jan 16, 2009

  • 8 Answers

SOURCE: wiring from thermostat to furnace

Typically you normally will have five wires controlling your furnace and airconditioning. R Y W G C. If you get some thermostat wire. Connect them like this---- red wire will go to R(this is your 24V to thermostat)----yellow wire will go Y(Y is your cooling)----white wire will go W(W is for heating)---green wire to G(green is your fan)---black can go to C(this is your common to supply 24Vto thermostat)

Posted on Jan 19, 2009

  • 221 Answers

SOURCE: Coleman Evcon..... Inducer Adjustment

Just wanted to make sure you knew this model is on a recall list:
http://www.dgatprogram.com/

Posted on Jan 02, 2010

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1 Answer

Coleman Evcon EB15B heat doesnt stop when it reaches the temp set on the themostat just gets hotter and hotter until I shut it of at the circuit breaker


Thermostat not doing it's job.
Probably the contacts on the thermostat are stuck together, Caused by arcing each time it opens.
If you are up to it.... clean the contacts or replace thermostat,

Cheers

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Hello, have you tried jumping the R and W wires on the thermostat sub base? If this turns on you furnace than the thermostat is bad, however if there is no display on the thermostat and does not power up by jumping the R and W Wires then most likely the transformer is bad and must be replaced.

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